增加Android系统的虚拟按键安全区

lib/app.dart

@@ -26,6 +26,12 @@ class App extends StatelessWidget {
             theme: ThemeData(primarySwatch: Colors.blue),
             theme: ThemeData(primarySwatch: Colors.blue),
             supportedLocales: AppLocalizations.supportedLocales,
             supportedLocales: AppLocalizations.supportedLocales,
             localizationsDelegates: AppLocalizations.localizationsDelegates,
             localizationsDelegates: AppLocalizations.localizationsDelegates,
+            // Android edge-to-edge 模式下虚拟导航键叠在内容上方，
+            // 通过 builder 统一包裹 SafeArea，所有路由页面自动适配底部安全区域。
+            builder: (context, child) => ColoredBox(
+              color: Colors.white,
+              child: SafeArea(top: false, child: child!),
+            ),
           );
           );
 
 
     // 全局默认状态栏样式兑底：透明背景 + 深色图标。
     // 全局默认状态栏样式兑底：透明背景 + 深色图标。

lib/ui/pages/media/preview_media_page.dart

@@ -45,7 +45,9 @@ class _PreviewMediaPageState extends State<PreviewMediaPage> {
       _initialized = true;
       _initialized = true;
     }
     }
 
 
-    return Scaffold(
+    return ColoredBox(
+      color: Colors.black,
+      child: Scaffold(
         backgroundColor: Colors.black,
         backgroundColor: Colors.black,
         body: Stack(
         body: Stack(
           children: [
           children: [
@@ -107,7 +109,7 @@ class _PreviewMediaPageState extends State<PreviewMediaPage> {
             ),
             ),
             if (_items.length > 1)
             if (_items.length > 1)
               Positioned(
               Positioned(
-              bottom: MediaQuery.of(context).padding.bottom + 24,
+                bottom: MediaQuery.of(context).viewPadding.bottom + 24,
                 left: 0,
                 left: 0,
                 right: 0,
                 right: 0,
                 child: Center(
                 child: Center(
@@ -130,6 +132,7 @@ class _PreviewMediaPageState extends State<PreviewMediaPage> {
               ),
               ),
           ],
           ],
         ),
         ),
+      ),
     );
     );
   }
   }